Apart from burning my tongue on molten hot lava pizza sauce, I think I’ve suffered the most self inflicted food injuries from tortilla chips. Occasionally one will flip exactly the wrong way and stab the roof of my mouth. I’ll jam one into my gums, stab my tongue or even miss my mouth altogether and draw blood from my cheek. Mostly though it’s the repeated slicing into the corners of my mouth over and over. It’s a sensitive area to be dragging salted sandpaper across.

They’re even worse when you have braces that already scratch at your mouth, and you have half-chewed chip stuck in between the teeth and the wire.
I was finishing off some tortilla chips as I read this comic.

My solution is to buy the bite-sized tortilla chips instead of the normal ones. My favourite brand are both bite-sized and round-shaped, so that the potential for injury is further minimized.

My most common food-related injury is when I’m drinking something through a straw, then absent-mindedly forget that there’s a straw in it and go to pick up my drink and take a sip directly from the glass, thus stabbing myself in the face with a straw. Fortunately I wear glasses, or I’m sure I’d have lost an eye or two through this process.